A Facebook sign-in option has not been implemented for the Wimdu Host App just yet. You can generate a password for the Wimdu Host App by logging in to your User Account. Go to the ‘Profile Settings’ section, click ‘Change your Password’, and then click ‘Forgot password’. The password which you set can be used to log into the Wimdu Host App along with the email address attached to your Facebook account. We are currently working on improving the App and will create this feature soon.